Hi Ranjith.
I dont know everything about this, but I guess you have a SEW drive on Profibus with the socalled ProfiDrive profile. "Profidrive" is another way of saying it uses the PPO mechanism for transferring data.
PPO is split into two parts, PZD for cyclically transmitted data (normally commands and status) data, and PKW for asyclically transmitted data (mormally parameters). Try to search for "ProfiDrive" on Siemens and SEWs websites to find out exactly how these match each other.
There are some members who knows more.
You can also look for how Siemens MicroMaster drives use the PPO/ProfiDrive. The method is similar, but the parameters are different for SEW and MicroMaster.